Description : This method is used to know if value exits an set. If a value is element of set the method return 1, and otherwise return 0.
Example :
//Run Code To Demonstrate use of set.count()
#include<iostream>
#include<set>
int main(){
// Create a set object holding integers
std::set<int> mySet {1,2,3,4,-5};
if(mySet.count(1)!=0){
std::cout << "1 : is not an element of myset" << std::endl;
}else{
std::cout << "1 : is a element of mySet" << std::endl;
}
if(mySet.count(12)!=0){
std::cout << "12 : is not an element of myset" << std::endl;
}else{
std::cout << "12 : is a element of mySet" << std::endl;
}
return 0;
}